boy in the boat vs clitoris

boy in the boat

noun
  • The human clitoris. 

clitoris

noun
  • A sensitive elongated erectile organ at the anterior part of the vulva in female humans and mammals, homologous with the penis. 

  • A similar erectile sexual organ present in the cloacas of female ratites. 

How often have the words boy in the boat and clitoris occurred in a corpus of books? (source: Google Ngram Viewer )